However, in the part file where I ran simulation for stress analysis, I can't get edges. This is what it looks like regardless of the display style I select. I can change the color, but I can't change to "shaded with edges" or "hidden lines removed". It all looks the same.

Scott, thanks for the reply! That's never a stupid idea, haha. But, alas, I have tried that. I just tried restarting my PC as well for kicks. No dice. I'm going to have to turn the weldment part file into an assembly at some point anyway, so I'll just go ahead and re-create subweldment parts sooner than later. It's really hard to tell what I'm looking at with no edges

I AM still hoping to get to the bottom of this though, cause this won't be the last time I use Simulation on a decent-sized weldment.

Keith, do you know if there's a way to change the appearance of ALL bodies at once to show edges? I have a part with 72 bodies, and most of them are set to the same appearance as the test part. Also, I'm pretty sure that the next time I run simulation it's going to do the same thing again.